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INSTALLER-SELECTABLE OPTIONS (cont'inued) Thunder Disable - The Thunder function can be completely disabled by moving one of the option jumpers inside the amplifier unit from "Extra" to the "TD". When Thunder is disabled, the Manual button will not have any effect on the tone while the siren is in the Yelp mode Two-Tone Enable - The Two-Tone function can be enabled by moving one of the option jumpers inside the amplifier unit from "Extra" to the "Two-Tone". When Two-Tone is enabled, a European Two-Tone sound will replace the Thunder sound when the Manual button is pressed while the siren is in the Yelp mode. (The tone will toggle between Yelp and Two-Tone each time the Manual button is pressed) Auxiliary Horn Polarity - The Auxiliary Input allows activation by an external source of the Horn function. This input is usually wired into the vehicle horn switch. The wiring diagram on page 6 shows two connection examples. NOTE: Permanent disconnection of the vehicle horn is NOT recommended. The auxiliary input is normally activated by applying a positive voltage to the wire. To activate by connecting to ground (negative), move the "AUX" option jumper from the "Pos." pins to the "Neg." pins. (See diagram above). Selector Switch Position: SIREN OUTPUT: Speaker Output -3- -8- Pressing Manual Pushbutton Wail Wail Yelp Yelp Yelp Thunder (or Two-Tone) (Remains Yelp if Thunder disabled) OFF <strong>No</strong> Output Creates a manual WAIL tone while button is being held that sweeps down when the button is released. (NOTE: THUNDER may be optionally disabled via program jumpers. See INSTALLER-SELECTABLE OPTIONS on pages 2 & 3). (NOTE: TWO-TONE may be optionally selected over Thunder via program jumpers. See INSTALLER-SELECTABLE OPTIONS on pages 2 & 3). AUXILIARY INPUT During installation an auxiliary input may be connected to the vehicle horn ring or other switching device. It provides the same operation as pressing the Horn button. See wiring diagram on page 6 for wiring details.
OPERATION GENERAL This unit is designed for easy operation under the stress associated with highspeed pursuit. Most siren functions are accessible with one simple motion without repetitive activation of switches or automatic timed switching that can interfere with desired operation. SELECTOR SWITCH The three-position rocker switch on the left controls the primary operating function of the siren. WAIL - A normal rise-fall tone used on highways and areas with low traffic or constant traffic flow. YELP - A rapid warble tone used in light to moderately congested areas. OFF - (Manual/Standby) - A silent mode that allows push-button Horn and push-button Manual (MAN). The siren output winds down when the Manual push-button switch is released. Manual With the left selector switch in the OFF position, the Manual side of the momentary switch provides a manually activated Wail siren tone. While the selector switch is in the Wail or Yelp position, this switch provides a generally quicker changing tone. (See table on next page). These quicker tones are used to momentarily alert motorists at intersections and very highly congested areas. Pressing the button once changes to the next faster tone. Pressing the Manual button again will toggle the siren back to the original tone. Optional configuration allows disabling of the Thunder tone entirely. This option is selected during installation and may be governed by State or Local laws. (Refer to the INSTALLER SELECTABLE OPTIONS section on pages 2 & 3). Horn This momentary push-button switch provides a simulated air-horn tone while pressed. This can be used to either replace, or to supplement the normal vehicle horn and is useful at intersections or in low noise areas. This tone will override all other siren tones. MOUNTING SAFETY PRECAUTIONS For the safety of the installer, vehicle operator, passengers and the community please observe the following safety precautions. Failure to follow all safety precautions and instructions may result in property damage, injury or death. !!! WARNING !!! DO NOT mount in air bag deployment area. Devices should be mounted only in locations listed in SAE standard J1849. Controls should be placed within convenient reach of the driver. Assure clearances before drilling in vehicle. Sound levels produced by attached speakers can cause permanent hearing loss. Never operate this unit without adequate hearing protection for you and others in the area. (OSHA 1910.95) AMPLIFIER The ST105 siren may be mounted above the dash, below the dash, on a tunnel, or in a rack with the mounting u-bracket provided. Choose a mounting location convenient to the operator and away from any air bag deployment areas. Inspect behind mounting area for clearance. Assure adequate ventilation to prevent overheating. Consider wire routing and access to connections. Install mounting bracket to vehicle using 1/4" hardware (not supplied). ELECTRICAL CONNECTIONS -- 15 -- 15 Amp Fuse Power Connector AMPLIFIER Electrical power connections to the amplifier are made using a removable connector located on the back of the amplifier case. You should make all electrical connections to the power connector before installing the connector on the unit. If the unit needs service, the power connector can be easily removed without unwiring the connector. The power supply of the unit must be capable of delivering peak currents up to 30 amps for adequate short circuit protection and reliable operation. The preferred source is directly at the vehicle battery. The unit is internally fused. A wiring diagram on page 6 shows detail of how to wire the power connector on the amplifier to the vehicle. -7- -4-
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